989430089 has 2 divisors, whose sum is σ = 989430090. Its totient is φ = 989430088.

The previous prime is 989430083. The next prime is 989430097. The reversal of 989430089 is 980034989.

989430089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 772840000 + 216590089 = 27800^2 + 14717^2 .

It is a cyclic number.

It is not a de Polignac number, because 989430089 - 2¹⁶ = 989364553 is a prime.

It is not a weakly prime, because it can be changed into another prime (989430083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494715044 + 494715045.

It is an arithmetic number, because the mean of its divisors is an integer number (494715045).

Almost surely, 2^989430089 is an apocalyptic number.

It is an amenable number.

989430089 is a deficient number, since it is larger than the sum of its proper divisors (1).

989430089 is an equidigital number, since it uses as much as digits as its factorization.

989430089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 989430089 is about 31455.2076610535. The cubic root of 989430089 is about 996.4642092517.

The spelling of 989430089 in words is "nine hundred eighty-nine million, four hundred thirty thousand, eighty-nine".